Crystallization-Differentiation of Basaltic MagmaKent Ratajeski
Department of Earth Sciences, Montana State University, Bozeman, MT
Published Oct. 26, 2004.
In this exercise, students use major-element compositions of whole-rocks, volcanic glasses, and minerals in lavas and drill cores from the solidified Kilauea Iki lava lake. The data is presented in the form of a "precompiled" spreadsheet which contains selected analyses culled from the GEOROC database and a USGS Open File report. Students make graphs from the data to learn about the petrologic processes related to the eruption and in situ crystallization of basaltic magma.